descriptors.cpp
资源名称:NETVIDEO.rar [点击查看]
上传用户:sun1608
上传日期:2007-02-02
资源大小:6116k
文件大小:18k
源码类别:
流媒体/Mpeg4/MP4
开发平台:
Visual C++
- /*
- * The contents of this file are subject to the Mozilla Public
- * License Version 1.1 (the "License"); you may not use this file
- * except in compliance with the License. You may obtain a copy of
- * the License at http://www.mozilla.org/MPL/
- *
- * Software distributed under the License is distributed on an "AS
- * IS" basis, WITHOUT WARRANTY OF ANY KIND, either express or
- * implied. See the License for the specific language governing
- * rights and limitations under the License.
- *
- * The Original Code is MPEG4IP.
- *
- * The Initial Developer of the Original Code is Cisco Systems Inc.
- * Portions created by Cisco Systems Inc. are
- * Copyright (C) Cisco Systems Inc. 2001. All Rights Reserved.
- *
- * Contributor(s):
- * Dave Mackie dmackie@cisco.com
- */
- #include "mp4common.h"
- MP4IODescriptor::MP4IODescriptor()
- : MP4Descriptor(MP4FileIODescrTag)
- {
- /* N.B. other member functions depend on the property indicies */
- AddProperty( /* 0 */
- new MP4BitfieldProperty("objectDescriptorId", 10));
- AddProperty( /* 1 */
- new MP4BitfieldProperty("URLFlag", 1));
- AddProperty( /* 2 */
- new MP4BitfieldProperty("includeInlineProfileLevelFlag", 1));
- AddProperty( /* 3 */
- new MP4BitfieldProperty("reserved", 4));
- AddProperty( /* 4 */
- new MP4StringProperty("URL", Counted));
- AddProperty( /* 5 */
- new MP4Integer8Property("ODProfileLevelId"));
- AddProperty( /* 6 */
- new MP4Integer8Property("sceneProfileLevelId"));
- AddProperty( /* 7 */
- new MP4Integer8Property("audioProfileLevelId"));
- AddProperty( /* 8 */
- new MP4Integer8Property("visualProfileLevelId"));
- AddProperty( /* 9 */
- new MP4Integer8Property("graphicsProfileLevelId"));
- AddProperty( /* 10 */
- new MP4DescriptorProperty("esIds",
- MP4ESIDIncDescrTag, 0, Required, Many));
- AddProperty( /* 11 */
- new MP4DescriptorProperty("ociDescr",
- MP4OCIDescrTagsStart, MP4OCIDescrTagsEnd, Optional, Many));
- AddProperty( /* 12 */
- new MP4DescriptorProperty("ipmpDescrPtr",
- MP4IPMPPtrDescrTag, 0, Optional, Many));
- AddProperty( /* 13 */
- new MP4DescriptorProperty("extDescr",
- MP4ExtDescrTagsStart, MP4ExtDescrTagsEnd, Optional, Many));
- SetReadMutate(2);
- }
- void MP4IODescriptor::Generate()
- {
- ((MP4BitfieldProperty*)m_pProperties[0])->SetValue(1);
- ((MP4BitfieldProperty*)m_pProperties[3])->SetValue(0xF);
- for (u_int32_t i = 5; i <= 9; i++) {
- ((MP4Integer8Property*)m_pProperties[i])->SetValue(0xFF);
- }
- }
- void MP4IODescriptor::Mutate()
- {
- bool urlFlag = ((MP4BitfieldProperty*)m_pProperties[1])->GetValue();
- m_pProperties[4]->SetImplicit(!urlFlag);
- for (u_int32_t i = 5; i <= 12; i++) {
- m_pProperties[i]->SetImplicit(urlFlag);
- }
- }
- MP4ODescriptor::MP4ODescriptor()
- : MP4Descriptor(MP4FileODescrTag)
- {
- /* N.B. other member functions depend on the property indicies */
- AddProperty( /* 0 */
- new MP4BitfieldProperty("objectDescriptorId", 10));
- AddProperty( /* 1 */
- new MP4BitfieldProperty("URLFlag", 1));
- AddProperty( /* 2 */
- new MP4BitfieldProperty("reserved", 5));
- AddProperty( /* 3 */
- new MP4StringProperty("URL", Counted));
- AddProperty( /* 4 */
- new MP4DescriptorProperty("esIds",
- MP4ESIDRefDescrTag, 0, Required, Many));
- AddProperty( /* 5 */
- new MP4DescriptorProperty("ociDescr",
- MP4OCIDescrTagsStart, MP4OCIDescrTagsEnd, Optional, Many));
- AddProperty( /* 6 */
- new MP4DescriptorProperty("ipmpDescrPtr",
- MP4IPMPPtrDescrTag, 0, Optional, Many));
- AddProperty( /* 7 */
- new MP4DescriptorProperty("extDescr",
- MP4ExtDescrTagsStart, MP4ExtDescrTagsEnd, Optional, Many));
- SetReadMutate(2);
- }
- void MP4ODescriptor::Generate()
- {
- ((MP4BitfieldProperty*)m_pProperties[2])->SetValue(0x1F);
- }
- void MP4ODescriptor::Mutate()
- {
- bool urlFlag = ((MP4BitfieldProperty*)m_pProperties[1])->GetValue();
- m_pProperties[3]->SetImplicit(!urlFlag);
- for (u_int32_t i = 4; i <= 6; i++) {
- m_pProperties[i]->SetImplicit(urlFlag);
- }
- }
- MP4ESIDIncDescriptor::MP4ESIDIncDescriptor()
- : MP4Descriptor(MP4ESIDIncDescrTag)
- {
- AddProperty( /* 0 */
- new MP4Integer32Property("id"));
- }
- MP4ESIDRefDescriptor::MP4ESIDRefDescriptor()
- : MP4Descriptor(MP4ESIDRefDescrTag)
- {
- AddProperty( /* 0 */
- new MP4Integer16Property("refIndex"));
- }
- MP4ESDescriptor::MP4ESDescriptor()
- : MP4Descriptor(MP4ESDescrTag)
- {
- /* N.B. other class functions depend on the property indicies */
- AddProperty( /* 0 */
- new MP4Integer16Property("ESID"));
- AddProperty( /* 1 */
- new MP4BitfieldProperty("streamDependenceFlag", 1));
- AddProperty( /* 2 */
- new MP4BitfieldProperty("URLFlag", 1));
- AddProperty( /* 3 */
- new MP4BitfieldProperty("OCRstreamFlag", 1));
- AddProperty( /* 4 */
- new MP4BitfieldProperty("streamPriority", 5));
- AddProperty( /* 5 */
- new MP4Integer16Property("dependsOnESID"));
- AddProperty( /* 6 */
- new MP4StringProperty("URL", Counted));
- AddProperty( /* 7 */
- new MP4Integer16Property("OCRESID"));
- AddProperty( /* 8 */
- new MP4DescriptorProperty("decConfigDescr",
- MP4DecConfigDescrTag, 0, Required, OnlyOne));
- AddProperty( /* 9 */
- new MP4DescriptorProperty("slConfigDescr",
- MP4SLConfigDescrTag, 0, Required, OnlyOne));
- AddProperty( /* 10 */
- new MP4DescriptorProperty("ipiPtr",
- MP4IPIPtrDescrTag, 0, Optional, OnlyOne));
- AddProperty( /* 11 */
- new MP4DescriptorProperty("ipIds",
- MP4ContentIdDescrTag, MP4SupplContentIdDescrTag, Optional, Many));
- AddProperty( /* 12 */
- new MP4DescriptorProperty("ipmpDescrPtr",
- MP4IPMPPtrDescrTag, 0, Optional, Many));
- AddProperty( /* 13 */
- new MP4DescriptorProperty("langDescr",
- MP4LanguageDescrTag, 0, Optional, Many));
- AddProperty( /* 14 */
- new MP4DescriptorProperty("qosDescr",
- MP4QosDescrTag, 0, Optional, OnlyOne));
- AddProperty( /* 15 */
- new MP4DescriptorProperty("regDescr",
- MP4RegistrationDescrTag, 0, Optional, OnlyOne));
- AddProperty( /* 16 */
- new MP4DescriptorProperty("extDescr",
- MP4ExtDescrTagsStart, MP4ExtDescrTagsEnd, Optional, Many));
- SetReadMutate(5);
- }
- void MP4ESDescriptor::Mutate()
- {
- bool streamDependFlag =
- ((MP4BitfieldProperty*)m_pProperties[1])->GetValue();
- m_pProperties[5]->SetImplicit(!streamDependFlag);
- bool urlFlag =
- ((MP4BitfieldProperty*)m_pProperties[2])->GetValue();
- m_pProperties[6]->SetImplicit(!urlFlag);
- bool ocrFlag =
- ((MP4BitfieldProperty*)m_pProperties[3])->GetValue();
- m_pProperties[7]->SetImplicit(!ocrFlag);
- }
- MP4DecConfigDescriptor::MP4DecConfigDescriptor()
- : MP4Descriptor(MP4DecConfigDescrTag)
- {
- AddProperty( /* 0 */
- new MP4Integer8Property("objectTypeId"));
- AddProperty( /* 1 */
- new MP4BitfieldProperty("streamType", 6));
- AddProperty( /* 2 */
- new MP4BitfieldProperty("upStream", 1));
- AddProperty( /* 3 */
- new MP4BitfieldProperty("reserved", 1));
- AddProperty( /* 4 */
- new MP4BitfieldProperty("bufferSizeDB", 24));
- AddProperty( /* 5 */
- new MP4Integer32Property("maxBitrate"));
- AddProperty( /* 6 */
- new MP4Integer32Property("avgBitrate"));
- AddProperty( /* 7 */
- new MP4DescriptorProperty("decSpecificInfo",
- MP4DecSpecificDescrTag, 0, Optional, OnlyOne));
- AddProperty( /* 8 */
- new MP4DescriptorProperty("profileLevelIndicationIndexDescr",
- MP4ExtProfileLevelDescrTag, 0, Optional, Many));
- }
- void MP4DecConfigDescriptor::Generate()
- {
- ((MP4BitfieldProperty*)m_pProperties[3])->SetValue(1);
- }
- MP4DecSpecificDescriptor::MP4DecSpecificDescriptor()
- : MP4Descriptor(MP4DecSpecificDescrTag)
- {
- AddProperty( /* 0 */
- new MP4BytesProperty("info"));
- }
- void MP4DecSpecificDescriptor::Read(MP4File* pFile)
- {
- ReadHeader(pFile);
- /* byte properties need to know how long they are before reading */
- ((MP4BytesProperty*)m_pProperties[0])->SetValueSize(m_size);
- ReadProperties(pFile);
- }
- MP4SLConfigDescriptor::MP4SLConfigDescriptor()
- : MP4Descriptor(MP4SLConfigDescrTag)
- {
- AddProperty( /* 0 */
- new MP4Integer8Property("predefined"));
- AddProperty( /* 1 */
- new MP4BitfieldProperty("useAccessUnitStartFlag", 1));
- AddProperty( /* 2 */
- new MP4BitfieldProperty("useAccessUnitEndFlag", 1));
- AddProperty( /* 3 */
- new MP4BitfieldProperty("useRandomAccessPointFlag", 1));
- AddProperty( /* 4 */
- new MP4BitfieldProperty("hasRandomAccessUnitsOnlyFlag", 1));
- AddProperty( /* 5 */
- new MP4BitfieldProperty("usePaddingFlag", 1));
- AddProperty( /* 6 */
- new MP4BitfieldProperty("useTimeStampsFlag", 1));
- AddProperty( /* 7 */
- new MP4BitfieldProperty("useIdleFlag", 1));
- AddProperty( /* 8 */
- new MP4BitfieldProperty("durationFlag", 1));
- AddProperty( /* 9 */
- new MP4Integer32Property("timeStampResolution"));
- AddProperty( /* 10 */
- new MP4Integer32Property("OCRResolution"));
- AddProperty( /* 11 */
- new MP4Integer8Property("timeStampLength"));
- AddProperty( /* 12 */
- new MP4Integer8Property("OCRLength"));
- AddProperty( /* 13 */
- new MP4Integer8Property("AULength"));
- AddProperty( /* 14 */
- new MP4Integer8Property("instantBitrateLength"));
- AddProperty( /* 15 */
- new MP4BitfieldProperty("degradationPriortyLength", 4));
- AddProperty( /* 16 */
- new MP4BitfieldProperty("AUSeqNumLength", 5));
- AddProperty( /* 17 */
- new MP4BitfieldProperty("packetSeqNumLength", 5));
- AddProperty( /* 18 */
- new MP4BitfieldProperty("reserved", 2));
- // if durationFlag
- AddProperty( /* 19 */
- new MP4Integer32Property("timeScale"));
- AddProperty( /* 20 */
- new MP4Integer16Property("accessUnitDuration"));
- AddProperty( /* 21 */
- new MP4Integer16Property("compositionUnitDuration"));
- // if !useTimeStampsFlag
- AddProperty( /* 22 */
- new MP4BitfieldProperty("startDecodingTimeStamp", 64));
- AddProperty( /* 23 */
- new MP4BitfieldProperty("startCompositionTimeStamp", 64));
- }
- void MP4SLConfigDescriptor::Generate()
- {
- // by default all tracks in an mp4 file
- // use predefined SLConfig descriptor == 2
- ((MP4Integer8Property*)m_pProperties[0])->SetValue(2);
- // which implies UseTimestampsFlag = 1
- ((MP4BitfieldProperty*)m_pProperties[6])->SetValue(1);
- // reserved = 3
- ((MP4BitfieldProperty*)m_pProperties[18])->SetValue(3);
- }
- void MP4SLConfigDescriptor::Read(MP4File* pFile)
- {
- ReadHeader(pFile);
- // read the first property, 'predefined'
- ReadProperties(pFile, 0, 1);
- // if predefined == 0
- if (((MP4Integer8Property*)m_pProperties[0])->GetValue() == 0) {
- /* read the next 18 properties */
- ReadProperties(pFile, 1, 18);
- }
- // now mutate
- Mutate();
- // and read the remaining properties
- ReadProperties(pFile, 19);
- }
- void MP4SLConfigDescriptor::Mutate()
- {
- u_int32_t i;
- u_int8_t predefined =
- ((MP4Integer8Property*)m_pProperties[0])->GetValue();
- if (predefined) {
- // properties 1-18 are implicit
- for (i = 1; i < m_pProperties.Size(); i++) {
- m_pProperties[i]->SetImplicit(true);
- }
- if (predefined == 1) {
- // UseTimestampsFlag = 0
- ((MP4BitfieldProperty*)m_pProperties[6])->SetValue(0);
- // TimestampResolution = 1000
- ((MP4Integer32Property*)m_pProperties[9])->SetValue(1000);
- // TimeStampLength = 32
- ((MP4Integer8Property*)m_pProperties[11])->SetValue(32);
- } else if (predefined == 2) {
- // UseTimestampsFlag = 1
- ((MP4BitfieldProperty*)m_pProperties[6])->SetValue(1);
- }
- }
- bool durationFlag =
- ((MP4BitfieldProperty*)m_pProperties[8])->GetValue();
- for (i = 19; i <= 21; i++) {
- m_pProperties[i]->SetImplicit(!durationFlag);
- }
- bool useTimeStampsFlag =
- ((MP4BitfieldProperty*)m_pProperties[6])->GetValue();
- for (i = 22; i <= 23; i++) {
- m_pProperties[i]->SetImplicit(useTimeStampsFlag);
- u_int8_t timeStampLength = MIN(64,
- ((MP4Integer8Property*)m_pProperties[11])->GetValue());
- ((MP4BitfieldProperty*)m_pProperties[i])->SetNumBits(timeStampLength);
- // handle a nonsensical situation gracefully
- if (timeStampLength == 0) {
- m_pProperties[i]->SetImplicit(true);
- }
- }
- }
- MP4IPIPtrDescriptor::MP4IPIPtrDescriptor()
- : MP4Descriptor(MP4IPIPtrDescrTag)
- {
- AddProperty( /* 0 */
- new MP4Integer16Property("IPIESId"));
- }
- MP4ContentIdDescriptor::MP4ContentIdDescriptor()
- : MP4Descriptor(MP4ContentIdDescrTag)
- {
- AddProperty( /* 0 */
- new MP4BitfieldProperty("compatibility", 2));
- AddProperty( /* 1 */
- new MP4BitfieldProperty("contentTypeFlag", 1));
- AddProperty( /* 2 */
- new MP4BitfieldProperty("contentIdFlag", 1));
- AddProperty( /* 3 */
- new MP4BitfieldProperty("protectedContent", 1));
- AddProperty( /* 4 */
- new MP4BitfieldProperty("reserved", 3));
- AddProperty( /* 5 */
- new MP4Integer8Property("contentType"));
- AddProperty( /* 6 */
- new MP4Integer8Property("contentIdType"));
- AddProperty( /* 7 */
- new MP4BytesProperty("contentId"));
- }
- void MP4ContentIdDescriptor::Read(MP4File* pFile)
- {
- ReadHeader(pFile);
- /* read the first property, 'compatiblity' */
- ReadProperties(pFile, 0, 1);
- /* if compatiblity != 0 */
- if (((MP4Integer8Property*)m_pProperties[0])->GetValue() != 0) {
- /* we don't understand it */
- VERBOSE_READ(pFile->GetVerbosity(),
- printf("incompatible content id descriptorn"));
- return;
- }
- /* read the next four properties */
- ReadProperties(pFile, 1, 4);
- /* which allows us to reconfigure ourselves */
- Mutate();
- /* read the remaining properties */
- ReadProperties(pFile, 5);
- }
- void MP4ContentIdDescriptor::Mutate()
- {
- bool contentTypeFlag = ((MP4BitfieldProperty*)m_pProperties[1])->GetValue();
- m_pProperties[5]->SetImplicit(!contentTypeFlag);
- bool contentIdFlag = ((MP4BitfieldProperty*)m_pProperties[2])->GetValue();
- m_pProperties[6]->SetImplicit(!contentIdFlag);
- m_pProperties[7]->SetImplicit(!contentIdFlag);
- }
- MP4SupplContentIdDescriptor::MP4SupplContentIdDescriptor()
- : MP4Descriptor(MP4SupplContentIdDescrTag)
- {
- AddProperty( /* 0 */
- new MP4BytesProperty("languageCode", 3));
- AddProperty( /* 1 */
- new MP4StringProperty("title", Counted));
- AddProperty( /* 2 */
- new MP4StringProperty("value", Counted));
- }
- MP4IPMPPtrDescriptor::MP4IPMPPtrDescriptor()
- : MP4Descriptor(MP4IPMPPtrDescrTag)
- {
- AddProperty( /* 0 */
- new MP4Integer8Property("IPMPDescriptorId"));
- }
- MP4IPMPDescriptor::MP4IPMPDescriptor()
- : MP4Descriptor(MP4IPMPDescrTag)
- {
- AddProperty( /* 0 */
- new MP4Integer8Property("IPMPDescriptorId"));
- AddProperty( /* 1 */
- new MP4Integer16Property("IPMPSType"));
- AddProperty( /* 2 */
- new MP4BytesProperty("IPMPData"));
- /* note: if IPMPSType == 0, IPMPData is an URL */
- }
- void MP4IPMPDescriptor::Read(MP4File* pFile)
- {
- ReadHeader(pFile);
- /* byte properties need to know how long they are before reading */
- ((MP4BytesProperty*)m_pProperties[2])->SetValueSize(m_size - 3);
- ReadProperties(pFile);
- }
- MP4RegistrationDescriptor::MP4RegistrationDescriptor()
- : MP4Descriptor(MP4RegistrationDescrTag)
- {
- AddProperty( /* 0 */
- new MP4Integer32Property("formatIdentifier"));
- AddProperty( /* 1 */
- new MP4BytesProperty("additionalIdentificationInfo"));
- }
- void MP4RegistrationDescriptor::Read(MP4File* pFile)
- {
- ReadHeader(pFile);
- /* byte properties need to know how long they are before reading */
- ((MP4BytesProperty*)m_pProperties[1])->SetValueSize(m_size - 4);
- ReadProperties(pFile);
- }
- MP4ExtProfileLevelDescriptor::MP4ExtProfileLevelDescriptor()
- : MP4Descriptor(MP4ExtProfileLevelDescrTag)
- {
- AddProperty( /* 0 */
- new MP4Integer8Property("profileLevelIndicationIndex"));
- AddProperty( /* 1 */
- new MP4Integer8Property("ODProfileLevelIndication"));
- AddProperty( /* 2 */
- new MP4Integer8Property("sceneProfileLevelIndication"));
- AddProperty( /* 3 */
- new MP4Integer8Property("audioProfileLevelIndication"));
- AddProperty( /* 4 */
- new MP4Integer8Property("visualProfileLevelIndication"));
- AddProperty( /* 5 */
- new MP4Integer8Property("graphicsProfileLevelIndication"));
- AddProperty( /* 6 */
- new MP4Integer8Property("MPEGJProfileLevelIndication"));
- }
- MP4ExtensionDescriptor::MP4ExtensionDescriptor()
- : MP4Descriptor()
- {
- AddProperty( /* 0 */
- new MP4BytesProperty("data"));
- }
- void MP4ExtensionDescriptor::Read(MP4File* pFile)
- {
- ReadHeader(pFile);
- /* byte properties need to know how long they are before reading */
- ((MP4BytesProperty*)m_pProperties[0])->SetValueSize(m_size);
- ReadProperties(pFile);
- }
- MP4Descriptor* MP4DescriptorProperty::CreateDescriptor(u_int8_t tag)
- {
- MP4Descriptor* pDescriptor = NULL;
- switch (tag) {
- case MP4ESDescrTag:
- pDescriptor = new MP4ESDescriptor();
- break;
- case MP4DecConfigDescrTag:
- pDescriptor = new MP4DecConfigDescriptor();
- break;
- case MP4DecSpecificDescrTag:
- pDescriptor = new MP4DecSpecificDescriptor();
- break;
- case MP4SLConfigDescrTag:
- pDescriptor = new MP4SLConfigDescriptor();
- break;
- case MP4ContentIdDescrTag:
- pDescriptor = new MP4ContentIdDescriptor();
- break;
- case MP4SupplContentIdDescrTag:
- pDescriptor = new MP4SupplContentIdDescriptor();
- break;
- case MP4IPIPtrDescrTag:
- pDescriptor = new MP4IPIPtrDescriptor();
- break;
- case MP4IPMPPtrDescrTag:
- pDescriptor = new MP4IPMPPtrDescriptor();
- break;
- case MP4IPMPDescrTag:
- pDescriptor = new MP4IPMPDescriptor();
- break;
- case MP4QosDescrTag:
- pDescriptor = new MP4QosDescriptor();
- break;
- case MP4RegistrationDescrTag:
- pDescriptor = new MP4RegistrationDescriptor();
- break;
- case MP4ESIDIncDescrTag:
- pDescriptor = new MP4ESIDIncDescriptor();
- break;
- case MP4ESIDRefDescrTag:
- pDescriptor = new MP4ESIDRefDescriptor();
- break;
- case MP4IODescrTag:
- case MP4FileIODescrTag:
- pDescriptor = new MP4IODescriptor();
- pDescriptor->SetTag(tag);
- break;
- case MP4ODescrTag:
- case MP4FileODescrTag:
- pDescriptor = new MP4ODescriptor();
- pDescriptor->SetTag(tag);
- break;
- case MP4ExtProfileLevelDescrTag:
- pDescriptor = new MP4ExtProfileLevelDescriptor();
- break;
- }
- if (pDescriptor == NULL) {
- if (tag >= MP4OCIDescrTagsStart && tag <= MP4OCIDescrTagsEnd) {
- pDescriptor = CreateOCIDescriptor(tag);
- }
- if (tag >= MP4ExtDescrTagsStart && tag <= MP4ExtDescrTagsEnd) {
- pDescriptor = new MP4ExtensionDescriptor();
- pDescriptor->SetTag(tag);
- }
- }
- return pDescriptor;
- }